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Curox M-102 is used as an initiator (radical source) in the curing of unsaturated polyester resins and surface coatings (fillers, gel-coats, putties, and top-coats).
Curox M-102 is used as an initiator in the curing process of unsaturated polyester resins.
Curox M-102's primary application is curing large surfaces in molds at ambient temperature using cobalt accelerators.
CAS Number: 1338-23-4
EC Number (EC / EINECS): 700‑954‑4
Chemical Name: Methyl ethyl ketone peroxide
Chemical Formula: C4H10O4
Molecular Weight: 122.12 g/mol
SYNONYMS:
Methyl ethyl ketone peroxide, MEKP, 2-Butanone peroxide, Ketone peroxide, MEKP mixture, Butanone Peroxide, Ketone Peroxide, MEKP Mixture
Curox M-102 is a hardener and initiator for curing of unsaturated polyester resins.
Curox M-102 has an aliphatic ester as a de-sensitizing agent and the lowest H2O2 content.
Curox M-102 is recommended for curing of molded parts, hand lamination, spray lay-up, centrifugal casting, filament winding, and casting of resins.
Curox M-102 has a shelf life of 6 months.
Curox M-102 is a colourless, mobile liquid, consisting of peroxides based on methyl ethyl ketone, essentially desensitised with aliphatic ester.
The "shelf life" (gel time of the resin + peroxide) of Curox M-102 is usually only a few hours, depending on temperature and resin type.
The "latency period" (gel time of resin + peroxide + catalyst) is relatively long, especially when it comes to curing ortho- or isophthalic resins.
Curox M-102, in the form of a colorless liquid, is ketone peroxide consisting of peroxides based on methyl ethyl ketone that has been de-sensitized with aliphatic ester.
An important feature of the 102 series hardeners is that they do not contain harmful phthalates.
Curox M-102's primary application is curing components in molds at ambient temperature using cobalt accelerators.
Curox M-102 is a standard curing agent for all types of unsaturated polyester resins at ambient temperature in conjunction with cobalt accelerators.
Standard dosages of Curox M-102 are 1-3% combined with 0.5-2% of a 1% cobalt accelerator or, alternatively, an amine accelerator.
Curox M-102 causes a moderate temperature increase, resulting in low internal stresses and a relatively short release time.
Temperatures below 20 ° C and some resin types significantly prolong the curing process, so the use of cobalt or amine accelerators is recommended.
In particular, Curox M-102 is recommended for curing vinyl ester resins with amine accelerators due to its low foaming properties, as well as for processing in hand lamination, spraying, casting, in the winding process and in building laminate surfaces (putties, gelcoats, topcoats) where large surfaces are laminated.
Curox M-102 is a commercial-grade organic peroxide based on methyl ethyl ketone peroxide (MEKP).
Curox M-102 is supplied as a stabilized liquid mixture and is primarily used as a free-radical initiator and hardener for curing unsaturated polyester (UP) resins and vinyl ester (VE) resins.
Curox M-102 is specially formulated for composite manufacturing processes requiring reliable room-temperature curing, good demolding performance, and controlled exothermic reaction characteristics.
USES and APPLICATIONS of CUROX M-102:
Curox M-102 is used as an initiator (radical source) in the curing of unsaturated polyester resins and surface coatings (fillers, gel-coats, putties, and top-coats).
Curox M-102 is a colorless, liquid mixture containing methyl ethyl ketone peroxide dissolved in an aliphatic ester.
Curox M-102 is used as an initiator in the curing process of unsaturated polyester resins.
Curox M-102's primary application is curing large surfaces in molds at ambient temperature using cobalt accelerators.
Curox M-102 is particularly suitable for curing vinyl ester resins in conjunction with amine accelerators.
Primary application of Curox M-102: For curing large molded parts at room temperature with cobalt catalyst.
Curox M-102 is used for curing of unsaturated polyester resins, suitable for all unsaturated polyester resin types and vinyl ester resins.
Curox M-102 is used as an initiator (radical source) in the curing of unsaturated polyester resins and vinyl ester resins.
Main application of Curox M-102: curing of large moulded parts at ambient temperature in combination with cobalt accelerators.
Curox M-102 is a methyl ethyl ketone peroxide used as a curing agent for unsaturated polyester and vinyl ester resins.
Curox M-102 is widely employed throughout the composites industry as a curing initiator for unsaturated polyester and vinyl ester resin systems.
Curox M-102 is extensively used in the production of fiberglass-reinforced plastics, structural composite components, marine equipment, automotive body panels, industrial tanks, pipes, construction materials, and corrosion-resistant products.
Curox M-102 is particularly suitable for hand lay-up processes, spray-up manufacturing, filament winding, centrifugal casting, resin casting, molded composite parts, gel coats, fillers, putties, top coats, and other polyester-based surface coating systems.
Because of its controlled curing behavior, Curox M-102 is frequently selected for large molded structures cured at room temperature in combination with cobalt-based accelerators.
Typical industrial dosage is approximately 1–3% Curox M-102 based on resin weight together with approximately 0.5–2% cobalt accelerator, although the optimum concentration depends on resin formulation, ambient temperature, and required curing speed.
Curox M-102 is widely used in the fiberglass, composites, marine, construction, transportation, and industrial manufacturing industries.
CHARACTERISTICS of CUROX M-102:
Curox M-102 is a highly efficient methyl ethyl ketone peroxide formulation specifically designed for curing thermosetting polyester and vinyl ester resin systems.
Curox M-102 has been desensitized with an aliphatic ester, providing improved storage stability while maintaining excellent curing efficiency.
Curox M-102 generates free radicals that initiate polymer crosslinking reactions, allowing resins to harden rapidly under ambient conditions.
Compared with many conventional peroxide systems, Curox M-102 provides balanced curing characteristics, moderate heat generation during polymerization, and relatively low internal stresses in the finished composite.
These features make Curox M-102 particularly suitable for manufacturing large molded components where dimensional stability and reduced cracking are important.
The formulation also offers reliable compatibility with cobalt accelerators and provides consistent curing performance across a broad range of polyester and vinyl ester resin formulations.
BENEFITS of CUROX M-102:
Curox M-102 provides rapid and reliable initiation of polyester and vinyl ester curing reactions while maintaining controlled exothermic behavior.
Curox M-102's balanced curing profile helps reduce internal stresses within finished composite parts, improving dimensional stability and minimizing the risk of cracking or distortion.
Curox M-102 delivers good room-temperature curing performance without requiring elevated curing temperatures, making it highly suitable for large industrial composite structures.
Curox M-102 produces reasonably short demolding times, improving manufacturing efficiency while maintaining high-quality surface finishes.
The stabilized formulation also offers improved storage stability and low hydrogen peroxide content compared with some conventional MEKP formulations.
Curox M-102's excellent compatibility with cobalt accelerator systems allows manufacturers to tailor curing speed and processing conditions for a wide variety of resin systems and fabrication methods.
Curox M-102, in the form of a colorless liquid, is ketone peroxide consisting of peroxides based on methyl ethyl ketone that has been de-sensitized with aliphatic ester.
Curox M-102 is used as an initiator (radical source) in the curing of unsaturated polyester resins and surface coatings (fillers, gel-coats, putties, and top-coats).
CURING PERFORMANCE of CUROX M-102:
Moderate heat release and therefore low internal stress.
Recommended for vinyl ester (VE) resins.
Relatively short demolding time, i.e. good demolding factor (fMR = tMR/tgel).
Temperatures below 20°C and/or some specific resin types can significantly retard curing, and more reactive grades of unsaturated polyester resins (CUROX M-202, 302, 402) are recommended; for VE resins, add an amine catalyst.
PROCESSING METHODS of CUROX M-102:
Particularly suitable for hand-covering, spray-covering, centrifugal casting, fiber winding, resin casting as well as surface coatings (fillers, fillers, gelatin coatings and topcoats).
Spraying equipment:
Use spray equipment using manufacturer's instructions.
Make sure all safety devices are working properly.
Do not clean the gun by spraying MEKP into the air.
Measurement of activity:
The "cobalt cure" test was performed at 25°C using OPA resin (20g in a test tube).
PHYSICAL and CHEMICAL PROPERTIES of CUROX M-102:
Chemical Name: Methyl ethyl ketone peroxide
CAS Number: 1338-23-4
Chemical Formula: C4H10O4
Appearance: colorless liquid.
Active Oxygen Content: approximately 8.61 TP3T w/w.
Antisensitizers: Use of fatty acid esters.
Density (20°C): approx. 1.01 g/cm³.
Viscosity (20°C): approx. 13 mPa-s.
Solubility: insoluble in water, miscible with ester, unsaturated polyester and vinyl ester resin.
Critical temperature (SADT): approx. 60°C.
Refrigeration stability: liquid can be below -25°C.
Recommended storage temperature: below 30°C.
The retention time of activity at 30°C is 6 months from the date of delivery.
CAS Number: 1338-23-4
EC Number (EC / EINECS): 700‑954‑4
Chemical Name: Methyl ethyl ketone peroxide
Chemical Formula: C4H10O4
Molecular Weight: 122.12 g/mol
Main active component: Methyl ethyl ketone peroxide (MEKP),
“reaction mass of butane-2,2-diyl dihydroperoxide and dioxydibutane-2,2-diyl dihydroperoxide”
CAS number: 1338-23-4
Appearance: Colourless, mobile liquid
Density (20 °C): ~ 1.01 g/cm³
Viscosity (20 °C): ~ 13 mPa·s (low-viscosity)
Active oxygen content: ≈ 8.6% (w/w) — a measure of peroxide activity in the mixture
Miscibility / Solubility: Practically insoluble in water; miscible with esters, unsaturated polyester resins (UP), vinyl-ester resins (VE) and related organic resins/solvents
Self-Accelerating Decomposition Temperature (SADT): ≈ 60 °C (package-scale limit for storage/shipping)
Stability / Storage: Stable under recommended storage (cool, ventilated, < 30 °C). Keeps liquid down to low temperatures (liquid even < –25 °C)
Recommended storage temperature: Below ~ 30 °C
Shelf-life / Activity retention: At 30 °C, activity maintained for several months (manufacturer indicates ~6 months)
Appearance: Colourless, clear, mobile liquid
Physical State: Liquid
Odour: Characteristic peroxide odour
Chemical Family: Organic peroxide
Active Oxygen Content: Approximately 8.6% (w/w)
Density (20°C): Approximately 1.01 g/cm³
Viscosity (20°C): Approximately 13 mPa·s
Water Solubility: Immiscible with water
Solubility: Miscible with esters, unsaturated polyester resins and vinyl ester resins
Desensitizing Agent: Aliphatic ester
Critical Temperature (SADT): Approximately 60°C
Recommended Storage Temperature: Below 30°C
Cold Storage Stability: Remains liquid below −25°C
Shelf Life (under recommended storage): Approximately 6 months
Delivery Form: Stabilized liquid mixture
Free Radical Source: Yes
Oxidizing Properties: Strong oxidizing organic peroxide
Thermal Stability: Heat-sensitive; decomposes when overheated
Flammability: Combustible organic peroxide
Polymerization Function: Radical initiator for crosslinking reactions
Compatible Resin Systems: Unsaturated polyester resins (UP), vinyl ester resins (VE)
Processing Temperature: Primarily ambient (room temperature) curing
Heat Evolution During Cure: Moderate
Internal Stress After Cure: Low
Demolding Performance: Good
Gel Time: Depends on catalyst concentration, resin type and temperature
Reactivity: High free-radical reactivity
Catalyst Compatibility: Excellent with cobalt-based accelerators
Industrial Grade Product: Yes
Consumer Use: Not intended for consumer applications
Handling Sensitivity: Sensitive to heat, contamination, reducing agents and incompatible materials.
Product Name: CUROX® M-102
Chemical Name: Methyl Ethyl Ketone Peroxide
CAS Number: 1338-23-4
EC Number: 700-954-4
Molecular Formula: C4H10O4 (representative formula of MEKP)
Molecular Weight: 122.12 g/mol
Chemical Family: Organic Peroxide
Product Type: Radical Initiator / Hardener / Curing Agent
Physical State: Liquid
Appearance: Colourless, mobile liquid
Appearance: colorless liquid.
Active Oxygen Content: approximately 8.61 TP3T w/w.
Antisensitizers: Use of fatty acid esters.
Density (20°C): approx. 1.01 g/cm³.
Viscosity (20°C): approx. 13 mPa-s.
Solubility: insoluble in water, miscible with ester, unsaturated polyester and vinyl ester resin.
Critical temperature (SADT): approx. 60°C.
Refrigeration stability: liquid can be below -25°C.
Recommended storage temperature: below 30°C.
The retention time of activity at 30°C is 6 months from the date of delivery.
FIRST AID MEASURES of CUROX M-102:
-Description of first-aid measures
*General advice:
Show this material safety data sheet to the doctor in attendance.
*If inhaled:
After inhalation:
Fresh air.
*In case of skin contact:
Take off immediately all contaminated clothing.
Rinse skin with
water/ shower.
*In case of eye contact:
After eye contact:
Rinse out with plenty of water.
Call in ophthalmologist.
Remove contact lenses.
*If swallowed:
After swallowing:
Immediately make victim drink water (two glasses at most).
Consult a physician.
-Indication of any immediate medical attention and special treatment needed.
No data available
ACCIDENTAL RELEASE MEASURES of CUROX M-102:
-Environmental precautions:
Do not let product enter drains.
-Methods and materials for containment and cleaning up:
Cover drains.
Collect, bind, and pump off spills.
Observe possible material restrictions.
Take up dry.
Dispose of properly.
Clean up affected area.
FIRE FIGHTING MEASURES of CUROX M-102:
-Extinguishing media:
*Suitable extinguishing media:
Carbon dioxide (CO2)
Foam
Dry powder
*Unsuitable extinguishing media:
For this substance/mixture no limitations of extinguishing agents are given.
-Further information:
Prevent fire extinguishing water from contaminating surface water or the ground water system.
EXPOSURE CONTROLS/PERSONAL PROTECTION of CUROX M-102:
-Control parameters:
--Ingredients with workplace control parameters:
-Exposure controls:
--Personal protective equipment:
*Eye/face protection:
Use equipment for eye protection.
Safety glasses
*Body Protection:
protective clothing
*Respiratory protection:
Recommended Filter type: Filter A
-Control of environmental exposure:
Do not let product enter drains.
HANDLING and STORAGE of CUROX M-102:
-Conditions for safe storage, including any incompatibilities:
*Storage conditions:
Tightly closed.
Dry.
STABILITY and REACTIVITY of CUROX M-102:
-Chemical stability:
The product is chemically stable under standard ambient conditions (room temperature).
-Possibility of hazardous reactions:
No data available
